Biology; Chemistry; Physics: Post your doubts here!

[Spidey21]

Can you please Explain again? Shouldn't it be B or something? Thnx in advance again to spidey and snoo!

look seeing that when White and Black bred the resultants were black which shows that BLACK is the dominant allele...
so it clearly puts out that white cant be Heterozygous cuz recessive alleles only show their effect in the absence of dominant allele

now remains B and C

now have a look when B and A bred solutions were all black
just a quick diagram

bb BB
Bb Bb Bb Bb



so all black and now white..

when C and D bred
Bb Bb bb bb

so you can deduce from here that D had bb
and C had Bb
so C is heterozygous!

 

[snoonono]

27-C
to avoid the air bubbles we use dat seive type thing shown in fermentors so C is the only possible answer
38-C
as in da 1st cross all ofsprings r black dis means dat B is homozygous dominant(RR) n A is homozygous recessive(rr)
in 2nd cross the ratio of ofsprings is 1:1 which can only be obtained if C is hetrozygous dominant(Rr) n D is homozygous recessive(rr)
note: the one dat is not dominant is always recessive
hope it didnt confuse you

yep thats correct

 

[Fallen316]

Q) phagocytes and lymphocytes are the same in size then why cant lymphocytes squeeze out of capillary walls in tissue fluid ?

 

[snoonono]

Q) phagocytes and lymphocytes are the same in size then why cant lymphocytes squeeze out of capillary walls in tissue fluid ?

am not sure, but i think its bcz they need to fight diseases in the blood

 

[Spidey21]

Q) phagocytes and lymphocytes are the same in size then why cant lymphocytes squeeze out of capillary walls in tissue fluid ?

because phagocytes have no fixed structure they are irregular in shape and Lymphocytes are circular in shape so phagocytes easily squeeze through the walls...

 

[snoonono]

Guys our teacher never helped us in ppr 6 physics, does any1 know how i can prepare for it, as in how to study and practice?
Thanks in advance

 

[Spidey21]

Guys our teacher never helped us in ppr 6 physics, does any1 know how i can prepare for it, as in how to study and practice?
Thanks in advance

http://www.xtremepapers.com/community/threads/physics-atp-revisionguide.15417/

 

[Umar Ilyas]

27-C
to avoid the air bubbles we use dat seive type thing shown in fermentors so C is the only possible answer
38-C
as in da 1st cross all ofsprings r black dis means dat B is homozygous dominant(RR) n A is homozygous recessive(rr)
in 2nd cross the ratio of ofsprings is 1:1 which can only be obtained if C is hetrozygous dominant(Rr) n D is homozygous recessive(rr)
note: the one dat is not dominant is always recessive
hope it didnt confuse you

Bravo! thanks!

 

[Rimsa]

Guys our teacher never helped us in ppr 6 physics, does any1 know how i can prepare for it, as in how to study and practice?
Thanks in advance

past papers =)

 

[snoonono]

past papers =)

but i dnt know the way of solving, do u?

 

[Umar Ilyas]

look seeing that when White and Black bred the resultants were black which shows that BLACK is the dominant allele...
so it clearly puts out that white cant be Heterozygous cuz recessive alleles only show their effect in the absence of dominant allele

now remains B and C

now have a look when B and A bred solutions were all black
just a quick diagram

bb BB
Bb Bb Bb Bb



so all black and now white..

when C and D bred
Bb Bb bb bb

so you can deduce from here that D had bb
and C had Bb
so C is heterozygous!

Thanks

 

[Fallen316]

What is oxygen debt ?

 

[Spidey21]

Thanks

np mate!!

 

[Rimsa]

but i dnt know the way of solving, do u?

erm yups. they are pretty easy. start with doing one from ms. you ll do the second one yourself

 

[Spidey21]

What is oxygen debt ?

when you respire vigourously you run out of oxygen (your body) and your body starts going into O2 debt by breaking the glucose present anaerobically and forming lactic acid and getting you energy...

so when you stop and start to rest you body starts breathing hardly to repay the O2 debt..
which converts the lactice acid back to glucose!!

 

[GetSomeLife]

look seeing that when White and Black bred the resultants were black which shows that BLACK is the dominant allele...
so it clearly puts out that white cant be Heterozygous cuz recessive alleles only show their effect in the absence of dominant allele

...

so you can deduce from here that D had bb
and C had Bb
so C is heterozygous!

What language is this?

 

[snoonono]

erm yups. they are pretty easy. start with doing one from ms. you ll do the second one yourself

k thanks

 

[Spidey21]

but i dnt know the way of solving, do u?

i just quoted and shared to you a link to a revisionguide go their and check it out!!

 

[Spidey21]

What language is this?

BIOLOGY!!!

 

[Rimsa]

k thanks

np

 

[Fallen316]

Difference b/w breathing & respiration ?